diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6fb1ec3..5a458a1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -86,7 +86,7 @@ jobs:
 
       - name: Add DLL path (Windows only)
         if: matrix.os == 'windows-latest'
-        run: echo "${{ env.INSTALL_PREFIX }}/lib" >> $env:GITHUB_PATH
+        run: echo "${{ env.INSTALL_PREFIX }}/bin" >> $env:GITHUB_PATH
 
       - name: Configure project with CMake
         working-directory: module
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e15280a..2f7aa9a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -76,6 +76,15 @@ if (NOT TARGET "${OPENDAQ_SDK_TARGET_NAMESPACE}::${OPENDAQ_SDK_TARGET_NAME}")
         FetchContent_MakeAvailable(${OPENDAQ_SDK_NAME})
     else()
         message(STATUS "Found installed ${OPENDAQ_SDK_NAME} version: ${${OPENDAQ_SDK_NAME}_VERSION}")
+        set(OPENDAQ_ALWAYS_FETCH_FMT OFF CACHE BOOL "" FORCE)
+
+        # Workaround: installed openDAQ coretypes uses INSTALL_INTERFACE:fmt::fmt-header-only
+        # which propagates FMT_HEADER_ONLY=1, conflicting with compiled fmt::fmt
+        # used by spdlog (LNK2005 on MSVC). Redirect fmt-header-only to compiled fmt.
+        if (TARGET fmt::fmt-header-only AND TARGET fmt::fmt)
+            set_property(TARGET fmt::fmt-header-only PROPERTY INTERFACE_COMPILE_DEFINITIONS "")
+            target_link_libraries(fmt::fmt-header-only INTERFACE fmt::fmt)
+        endif()
     endif()
 endif()
 add_subdirectory(external/boost)
diff --git a/external/CMakeLists.txt b/external/CMakeLists.txt
index 4f2433b..a8d6ad2 100644
--- a/external/CMakeLists.txt
+++ b/external/CMakeLists.txt
@@ -1,3 +1,5 @@
+opendaq_get_cmake_mode(_LT_STREAMING_CMAKE_LEGACY_MODE_SAVED)
+opendaq_set_cmake_mode(ANCIENT)
 set(CMAKE_FOLDER external)
 list(APPEND CMAKE_MESSAGE_CONTEXT external)
 
@@ -13,3 +15,4 @@ add_subdirectory(spdlog EXCLUDE_FROM_ALL)
 add_subdirectory(nlohmann_json EXCLUDE_FROM_ALL)
 add_subdirectory(streaming_protocol EXCLUDE_FROM_ALL)
 
+opendaq_set_cmake_mode(${_LT_STREAMING_CMAKE_LEGACY_MODE_SAVED})
diff --git a/opendaq_ref b/opendaq_ref
index 88d050b..d0a6910 100644
--- a/opendaq_ref
+++ b/opendaq_ref
@@ -1 +1 @@
-main
\ No newline at end of file
+4757349a1db30721bead0cb695ec3a147913aef4